The battery energy storage portfolio has completed its second quantitative schedule risk analysis cycle. After three risk workshops and two Monte Carlo QSRA runs, the KonradBeck risk advisory team reports that the portfolio's P80 date for the final site now falls inside its interconnection window, with contingency tied to named, owned risks across all four sites.
Where the portfolio started
The first QSRA told an uncomfortable story. The deterministic schedule showed all four sites energizing on time. The simulation said the final site had less than an even chance of meeting its interconnection date, and the gap between P50 and P80 was wide enough to put tax-credit timing at risk. The driver was not construction. It was everything around it: transformer deliveries, utility upgrade work and permitting on one site that had not been modeled with logic.
The schedule said green. The risk model said coin flip. The value was in the difference, and in having found it with a year still to go.
Risk advisory lead, KonradBeck
What changed between cycles
- Logic for the utility work. Interconnection upgrades were added to the schedule as activities with real predecessors, not as a single milestone with a hard date.
- Procurement risk priced. Long-lead transformer and switchgear deliveries got ranges based on vendor history, and one order was moved earlier to buy float.
- Site sequencing revised. Commissioning resources were resequenced so the sites with the tightest windows go first.
- Contingency rebuilt from risks. Schedule and cost contingency are now sized to the P80 result and allocated by site and risk, not held as a flat percentage.
What the second run shows
The spread between P50 and P80 has narrowed, and the P80 date for the final site now sits inside the interconnection window. The top risks are fewer, better understood and each assigned to someone with the authority to act on them. The portfolio still has risk. It now knows where that risk lives.
What comes next
Risk updates move to a monthly cycle tied to the schedule data date. The owner's executive report now shows each site's P50 and P80 dates side by side, along with contingency drawdown against the risks retired. The next QSRA is planned after major equipment deliveries, when the biggest remaining uncertainty should resolve.
